Article for use in an aerosol provision system

Abstract

An article for insertion into an apparatus for heating an aerosol generating material to aerosolize at least one component of the aerosol generating material includes an aerosol generating material and a downstream portion downstream of the aerosol generating material. The downstream portion has at least one ventilation area and a first air flow path is defined in which air drawn through the article at its downstream end passes through the aerosol generating material, and a second air flow path is defined in which air drawn through the article at its downstream end is drawn into the article through the at least one ventilation area in the downstream portion. The resistance to draw of the second air flow path is greater than the resistance to draw of the first air flow path. An article is also provided in which an aerosol generating material is wrapped by a wrapper having a level of permeability greater than about 2000 Coresta Units. An article is also described having a ventilation level of between 40% and 60% ventilation. A system and a method for forming an article are also described.

1 . An article for insertion into an apparatus for heating an aerosol generating material to aerosolise at least one component of the aerosol generating material, the article comprising:
 an aerosol generating material, and a downstream portion downstream of the aerosol generating material, the downstream portion comprising at least one ventilation area, wherein a first air flow path is defined in which air drawn through the article at its downstream end passes through the aerosol generating material, and a second air flow path is defined in which air drawn through the article at its downstream end is drawn into the article through the at least one ventilation area in the downstream portion, and the resistance to draw of the second air flow path is greater than the resistance to draw of the first air flow path.   
     
     
         2 . The article according to  claim 1 , wherein the aerosol generating material is wrapped in a wrapper, and at least part of the air flow through the first air flow path goes through the wrapper. 
     
     
         3 . The article according to  claim 2 , wherein the wrapper has a level of permeability greater than about 2000 Coresta units. 
     
     
         4 . An article for insertion into an apparatus for heating an aerosol generating material to aerosolise at least one component of the aerosol generating material, the article comprising:
 an aerosol generating material, wherein the material is wrapped by a wrapper having a level of permeability greater than about 2000 Coresta Units, and a downstream portion downstream of the aerosol generating material, comprising at least one ventilation area.   
     
     
         5 . The article according to  claim 3 , wherein the wrapper is formed from an inherently porous material. 
     
     
         6 . The article according to  claim 3 , wherein the wrapper is provided with perforations. 
     
     
         7 . The article according to  claim 3 , wherein the wrapper has a level of permeability from about 2000 Coresta Units to about 20000 Coresta Units, or about 2000 Coresta Units to about 10000 Coresta Units, or about 2000 Coresta Units to about 5000 Coresta Units. 
     
     
         8 . The article according to  claim 1 , wherein the downstream portion comprises a hollow tubular element. 
     
     
         9 . The article according to  claim 8 , wherein the hollow tubular element comprises a wall comprising an aerosol generating material. 
     
     
         10 . The article according to  claim 8 , wherein the hollow tubular element comprises the at least one ventilation area. 
     
     
         11 . The article according to  claim 8 , wherein the hollow tubular element is arranged at the downstream end of the article and comprises a length of at least about 10 mm or greater than about 12 mm. 
     
     
         12 . The article according to  claim 8 , wherein the hollow tubular element comprises a first hollow tubular element, and wherein the downstream portion comprises a second hollow tubular element downstream of the first hollow tubular element. 
     
     
         13 . The article according to  claim 12 , wherein the first and/or second hollow tubular element is formed from filamentary tow. 
     
     
         14 . The article according to  claim 12 , wherein the first and/or second hollow tubular element is formed as a paper or cardboard tube. 
     
     
         15 . The article according to  claim 1 , wherein the downstream portion comprises a cylindrical body of material downstream of the ventilation area. 
     
     
         16 . The article according to  claim 15 , wherein the cylindrical body of material comprises filamentary tow. 
     
     
         17 . The article according to  claim 15  when dependent from  claim 12 ,  13  or  14 , wherein the body of material is positioned between the first hollow tubular element and the second hollow tubular element. 
     
     
         18 . The article according to  claim 16 , wherein the filamentary tow comprises a weight per mm of length of the body of material which is between about 10% and about 30% of the range between the minimum and maximum weights of a tow capability curve generated for the filamentary tow. 
     
     
         19 . The article according to  claim 1 , the article comprising a ventilation level of between about 10% and about 60%, or between 40% and 60% ventilation, or between about 15% and 45% ventilation. 
     
     
         20 . An article for insertion into an apparatus for heating an aerosol generating material to aerosolise at least one component of the aerosol generating material, the article comprising a ventilation level of between 40% and 60% ventilation. 
     
     
         21 . The article according to  claim 8 , wherein the apparatus comprises a non-combustible aerosol provision device, and wherein the article is configured such that when the article is inserted into the non-combustible aerosol provision device, the minimum distance between a heater of the non-combustible aerosol provision device and the hollow tubular element of the article is at least about 3 mm. 
     
     
         22 . A non-combustible aerosol provision system comprising: an article according to  claim 1 ; and a non-combustible aerosol provision device for heating the aerosol generating material of the article. 
     
     
         23 . The non-combustible aerosol provision system according to  claim 22 , wherein the non-combustible aerosol provision device comprises a coil. 
     
     
         24 . The non-combustible aerosol provision system according to  claim 22 , wherein the article comprises an aerosol modifying component, and wherein the non-combustible aerosol provision device comprises a heater which, in use, is operable to heat the first aerosol generating material such that the first aerosol generating material provides an aerosol, wherein the aerosol modifying component is downstream of the aerosol generating material and further comprises: a first capsule in a first portion of the aerosol modifying component, wherein the first portion of the aerosol modifying component is heated to a first temperature during operation of the heater to generate the aerosol; and, a second capsule in a second portion of the aerosol modifying component located downstream of the first portion, wherein the second portion is heated to a second temperature during operation of the heater to generate aerosol, and wherein the second temperature is at least 4 degrees Celsius lower than the first temperature. 
     
     
         25 . A method for forming an article according to  claim 1  to  21 , comprising wrapping a rod of aerosol generating material in a permeable wrapper, and forming a ventilation area in a downstream portion connected to the rod of aerosol generating material. 
     
     
         26 . The method for forming an article according to  claim 25 , comprising providing the level of permeability to the wrapper by embossing perforations. 
     
     
         27 . The method for forming an article according to  claim 25 , comprising providing the level of permeability to the wrapper by laser perforation. 
     
     
         28 . The method for forming an article according to  claim 25 , comprising providing the level of permeability to the wrapper by electrostatic perforation.